Near the end of the season when outdoor temperatures begin to consistently fall below 60°F, it is time to move your caladium plants indoors if you want to keep them actively growing. It’s possible to continue to grow them as a houseplant for at least a few months until they naturally enter a resting period.
Choose a place indoors that receives bright indirect light. Set the pot on a saucer filled with pebbles and water to keep the humidity up around the plant. Caladiums need humidity to thrive, so a bright bathroom might be the perfect spot for them.
If you purchase your caladium plant in the fall or winter, do your best to keep it warm until you get home and bring it right inside. Do not let it sit in your cold car for any amount of time. This is similar to how you should treat poinsettias.